Band clip



C. l. LOPDELL.

BAND CLIP.

APPLICATION FILED AUG.27, 1921.

Patented Apr. 11, 1922.

2 SHEET$-$H EET 1.

C. l. LOPDELL.

, BAND CLlP.

APPLICATION FILED umzr. 1921.

Patented Apr. 11, 1922'.

2 SHEETS-SHEET 2.

-, CHARLES I. LornELn. or summon, meme;

BAND onIP.

Specification ofLettcrs PaTte'nt, kl at tl d Apnlh Application filedAugust 27,, 1921: Sria1'No.' 49 6 ,157l 1 3 GRANTED UNDER THE"PROVISIONS or THE AQT-OFM-ARCE 3; 192'i3'41 some. 13., 1313 l a To allwhom it may concern:

Be it knownthat I, CHARLES Invnns Lo-P- DELL-,3 subject of the King ofGreat Britain, and resident of 2 /Vestfi'eld Place, Surbiton, in-thecounty of Surrey, England, have invented certainnew and usefulImprovements in-Band Clips, (for which I havefiled an application forpatent in England, No. 160,658, dated March 12, 1920, and an applicationforpatent in France dated February 21921,) of which the following is aspecification. v 4 1 p This invention relates to band clips or clampingdevices such as are used for securing hose pipes to' metalpiping and fora variety of similar purposes. It is the 'objeet oit this invention toprovide an; improved clip ofthis character; According to the preventinvention a band clip is provided whereinthe bandonly'requires to haveplain inwardly hooked ends for" engaging purposes. The endsoftheband'are folded inwardly betweena nut and collar which are soformed that the latter fits over the former,

the gripping sides of thenut being chainfered or curved at its gripping'faees while the collar is-shaped to. correspond. With J thisarrangement gripping and tightening of the ends of the band take placewith increasing intensity as the nut is drawn up against the collar byscrew bearing cen- "tra l'ly against abridge piece. This arrangementalso has th'e advantage that bands with plainends can be used, the userbending over the free end of the band for gripping pur poses if desired,so'that the length of the band for} gripping purposes is adjustablewithin'the'limitsof size for which the clip is applicable} Thenew-construction is adapted to enable asingle comparatively narrow andplain bandto' be tightened'on ari article such as a hose pipejoint,without'risl: of slipping of the band, while allowing of detaching andre-applying theclip'at any timeif desired.

The accompanying drawings-ShoW various constructions of the clipaccording to the present invention. Inthe said drawings Figure 1 is a.sectional elevation of one "form of clip, and shows the clip with oneend only of the band in engagement between the nut nd collar. r

Figure 2 is asimilar viewto Figurefl but shows the clip gripping andtightened up;

F1gure3 is perspective view showing oneform of nut Figure 'is aform ofnut and collar. Figure 5 is'a" form of'nut:

and" collar.

Figure 6 is a perspective view of a clip provided with a nut as shown inFigure 5. i

- Figure 7 is a sectionalelevationof'a form perspective view of anotherperspectiveview of another of'construction of'rclip fo-r' use on jointsof large diameter;

part: of Figure/7. V

In-the construction shown'in'Figures 1 Figure 8 is a=detailview-inperspective of and)? of the drawings, a nut 1 with plain,

chamfered or rounded side faces is used, worklng'on' a"scre-w 2 .whichbears on a bridge 3 having slots at permanently around one side ofthecollar 6- while the other end may be left plain, or

already formed with aninwardly directed 4 therein through whlch the band5-Iis passed, the ends of the hook for engaging withrthe other sideofthe collar. If the end is left plain, it is out off toa suitablelength for example at8 (Figure 1), and this-end isbent over in, wardlyas shown'in dotted lines in Figure 1,-

hooked overthe collar" 6, and the nut is tlght'ened by means of tliescrew 2 so that the inwardly hooked ends" of" the band are grippedbetween-the side faces of tlie nut and the collar as shown in Figure2.,f lhe pull O11=tl18 b and tends to pull down the collar' an'd'tocause it to grip the hooked ends of the i :band stillmore tightlyagainst the faces of V the nut.

. There is a tendency with the band gripped in this manner, for it topull downwardlythe middle portionsof the-sides of the. collar, and thus:to: stretch or strain-thefedges' -oflthe' band whereit passes overthecol hr; in cases where astron'g gripp ng -pressure hasto' be applied,th1s may causeT-tearing of thelb'andv In order to avoid this, 7

the sides of the collarmaybe arched lupwards slightly as shown at '10 inFigures 3' and 4 so that the pull on theban'd when.

it is gripped first tends to come on its centre line, and the increasingtension will then tend to pull down and straighten out the sides of thecollar. In this way the tension across the section of the band may bemade such that there is no increased strain at its edges, and notendency to initiate a tearing action there. A similar result may besecured by making the chamfered faces of the nut with a slight outwardbend or bulge in the middle as shown in Figure 5. The collar 6 thencausesthe g 'ripping of the band to take place first about the middle ofthe outwardly curved surface at 11, whereupon the collar itself becomesbent slightly until the edges of the band are gripped tightly also, aswill be seen from Figure 6 which shows a clip provided with a nut of thekind shown in Figure 5. As the collar becomes distorted to a curved formto fit the coned surface of the nut, the ends of the band are curved orkinked transversely as seen in Figure 6,

' and thus prevented from straightening out.

The security of the engagement is therefore increased in this case. Thisresult is attained whenever a nut having outwardly curved and chamferedside faces is used, with a collar which can be distorted under tensionto lie around the curved faces of the nut.

Figure 7 shows a form of construction of clip foruse with oints of largediameter. It will be realized that when a clip of the characterdescribed is to be applied to a pipe or hose of large section, if thelength of band is so chosen that its free end can be engaged easily byhand with the collar 6, the length of the band which would have to bedrawn out by the screw 2 in order to apply sufficient tension forgripping purposes might often be excessive, and the grip would beunreliable in action, while the pressure probably would not be evenlydis-' tributed around the circumference of the pipe orthe like. Theconstruction of Figure 7 overcomes both of these difficulties by theprovision of additional means for tale ing up the length in the band sothat the clip engaged by the ends of the band only needs to have areasonably small adjust ment for tightening purposes. Figure 7 shows aclip suitable for a large hose p1ping such as is used in oil pipe lines,and it includes two additional tensioning devices; it will beunderstood, however, that one only of these, or more than two may beused according to circumstances. Each additional tensioning deviceconsists of a bridge member 3 through holes 4e in which the band isthreaded, while a screw 2 passing through a rounded nut 1, and through ahole or slot cut in the centre line of the band 5, serves to apply thetension. The two additional tensioning devices and the clip with whichthe ends of the band engage are preferably spaced at equal angular distances apart around the joint so that they can be used equally fortensioning the band and making the pressure approximately cvenaround thewhole circumference of the joint. It will be realized that theadditional tensioning devices may have the bridge 3, screw 2 and nut 1identical in. form withthose used in the clip for the ends of the band,the only difference being that the collar 6 is not needed where the bandis continuous and can bear directly on the nut 1 as shown. The provisionof further tightening devices around the band enables a sufiicient freelength to be left at the end of the band for ease in engaging it withthe clip, and thereafter this free length can be taken up whiledistributing the pressure evenly around the joint.

With this construction the several pulls on the band 5 are effected overa portion only thereof, and as thecurvature of each of these portions isrelatively small, decreasing as it does as the size of the clipincreases, a strong grip is obtained around the whole joint. When theclip is used upon oil pipe lines, and when the joint is more or lesspermanent, the heads of the screws 2 may be cut off flush with. the nuts1 as indicated on one of the tightening devices in Figure 7 and inperspective in Figure 8.

In all the constructions according to the invention, the clip is readilydetachable at any time unless the heads of the screws are cut off asexplained with reference to Figure 8, and the band can therefore bereleased and applied again as often as may be required.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is 1. A band clip device of the type de- 4scribed, comprising a band member, a bridge piece formed with slotsthrough which the hand can pass, said bridgepiece beingshaped toacurvature corresponding approximately to the curvature ofthe article towhich the clip is to be applied, a screw bearing centrally. upon saidbridge piece, a'nut on said screw, and a collar adapted to fit over saidnut, the ends of said band member being bent over inwardly for engagingpurposes in such manner that they engage over the collar and theirinwardly turned ends are adapted to be gripped-be tween said nut andcollar when the nut is drawn outwardly by turning said screw.

2. A band clip as claimed in clain l, the 7 nut whereof has inclinedouter faces,-, and the collar, whereof has its inner faces inclined tocorrespond with the inclined faces of said nut.

3. A band clip as claimed in claim 1, the

collar whereof has the sides over which the inwardly turned ends of theband engage raised at the centre in such manner that formed with slotsthrough'which the band the pull on the hand during gripping takespasses, a screw bearing centrally on. said adplace first at the centreline thereof. ditional bridg'e piece and passing through '10 4. Thecombination With a band clip dean aperture in said band, and a 'nut' onsaid 5 vice as claimed in claim 1, of additional screw between saidadditional bridge piece tightening means in the length of the band andthe band. comprising an additional bridge piece CHARLES I. LOPDELL. r

